Rule.



No. 687,762. Patented Dec. 3, |90I. E. LAUTENBACH.

RULE.

(Applicatioh filed Feb. 26, 1901.) (No Model.)

7 I /`7 l I y vb 5 g 1f f. V JJ f/ I {lf/P -Z l l l illnllllllllx IIIIIIIIIIIIIIIIillillv THE News Parras co. wnorauwo.. wAsmNGmN, n. c

"UNITED STATES PATENT OFFICE,

EVERT LAUTENBACH, OF CHICAGO, ILLINOIS.

RULE.

SPCIFCATON forming part of Letters Patent No. 687,762, dated December 3, 1.901.

Application filed February 26, 1901. Serial No. 48,896. (No model.)

To aZZ whom t may concern:

Be it known that I, EV'ERT LAUTENBACH, a citizen of the United States, residing at Ohicago, in the county of Cook and State of Illia nois, have invented certain new and useful Improvements in Rules or Measures; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying draw ings, and to thefigures of reference marked thereon, which form a part of this specification.

My invention relates to improvements in rules; and it consists in providing a rule or measure, particularly an ordinary carpenters rule, Witha rigid strip pivoted at one end in onearm of the rule and adapted to engage its free end in indentations in the other arm of the rule, whereby the parts may be set atditferent angles, particularly at ninety degrees to form a square or at forty-five degrees to l form a miter.

Referring to the drawings, Figurel shows a carpenters rule provided with my improvement set at an angle of ninety degrees and u in dotted lines as set at an angle of forty-five degrees. Fig. 2 is a view of the inner edge of the rule with the connecting-strip in closed position. Fig. 3 is a perspective of the strip 'i j detached, and Fig. 4 is a cross-section of the same.

The arms 5 and 6, pivoted at 7, represent the rule. A metal strip 8, having a flange 9, is pivoted at one end by a pin 10 in a slot 12 in the inner edge of one arm of the rule, which slot is adapted to receive the strip when in closed position. In the other arm of the rule areindentations or recesses 13 and 14, adapted to receive the free end of the strip 8 and set the arms at angles of ninety degrees and forty-five degrees, respectively.

The lange9 is preferably of the same width and thickness as the brass binding commonly away or a depression made in the rule, as at 1l, so that when the strip is closed or seated in the slot 12 the flange is flush with the edge of the rule and the continuity of the straightedge preserved.

By the construction indicated the ordinary use'of the rule in ruling and measuring is not interfered with, nor its appearance materially changed, which is an advantage over those rules designed for the same purpose in which the connecting or adjusting arm when not in use projects or causes a surface irregularity,- which interferes with the general use of the rule.

The strip 8 and flange 9 forn/ a rigid connection or support, which will not buckle or yield to the ordinary pressure in ruling along the edge of the rule, as is apt to occur with rules having a spring or flexible connection between the arms. My invention permits of Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is@

l. A jointed rule having pivoted to one arni v a flanged strip adapted, when closed, to enl ter a depression in the arm to which. it ispivoted and form a flush surface therewith, and adapted when open to engage at its free end indentations in the other arm of the rule.

2. A jointed rule having pivoted to one arm the strip 8 having the ange 9, a depression in the arm adapted to receive the strip and iiange, and indentations in the other arm adapted to engage the end of the strip.

In testimony whereof I affix my signature in' presence of two witnesses.

EVERT LAUTENBAOH.

Witnesses:

GEORGE E. TEW, E. M. STALEY. 

